Antonyms for abatement

lessening:

increase, rise, enlargement.

noun:

authorization, legislation, gain, ordering, appreciation, uptick, supplement, upswing, approval, accretion, enactment, ratification, accrual, clearance, accumulation, validation, increment, founding, permission, passing, sanctioning, addition, upturn, augmentation, legalization, endorsement, enlargement, establishment, prescription, legitimation, institution, raise, extension, boost, legitimization, mandating, accession, continuation, uptrend, formalization, commandment.